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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Is SPORT mode more efficient than COMFORT? (results)

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      01-02-2018, 10:09 PM   #23
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Quote:
Originally Posted by Nezil View Post
Please keep in mind that the OP is based in the UK, and therefore his calculations are based on UK Gallons rather than US Gallons. He's also using V-Power Fuel, which has a RON rating of 99 if I remember correctly, with no added Ethanol, which would be somewhat equivalent to Ethanol free 94 AKI / (RON+MON)/2 US Fuel.

I find it funny that Brits often think that US drivers have it so good with cheap fuel, but the reality is that the cost is skewed because the gallon is smaller in the US, and the fuel is shit so the same cars are far less efficient. Yes, it is still cheaper to run a car in the US, but far less than it first appears.

For reference, a UK Gallon is 4.54 litres, and a US Gallon is 3.78. That's a difference of 20.1%.
...
I am lucky to get 19 MPG daily driving, and maybe 24 MPG on a long highway run. The only thing I can think of is this being the result of the crappy CA 10% Ethanol 91 AKI fuel that we have here!
Great point about UK vs US gallon and about US gas being much worse - I had heard fuel in Europe was better and certainly took note of this while on my M2 ED trip (with the exception of the lone Italian gas station I visited, which didn't label its pumps ).

It's amazing how often ppl in the US bitch about our fuel prices, and even more amazing how often ppl here bitch when they realize their new car requires premium. In MD, most gas stations offer 87/89/93 but when traveling extensively out west, I often saw worse choices, such as 85/87/89/91. And don't even get me started on ethanol...
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      01-03-2018, 11:32 AM   #24
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Why buy an M2 and worry about gas mileage. Totally inane.
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      01-03-2018, 01:04 PM   #25
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Quote:
Originally Posted by MZWIE View Post
Why buy an M2 and worry about gas mileage. Totally inane.
I wouldn't call this thread "worry" - more like curiosity; as in, you buy the M2 w/o caring about its fuel efficiency, but then you may be simply curious how much it's using. Not the same as caring.
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      01-03-2018, 01:20 PM   #26
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Yeah, out of the guys on this forum, I REALLY doubt they'll take the best mileage finding from this thread and drive like that going forward. It's more of how these cars work type of thing.....and especially curious if sport delivers better mileage than comfort.
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      01-03-2018, 01:33 PM   #27
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Quote:
Originally Posted by McGary911 View Post
Yeah, out of the guys on this forum, I REALLY doubt they'll take the best mileage finding from this thread and drive like that going forward. It's more of how these cars work type of thing.....and especially curious if sport delivers better mileage than comfort.
I'm curious about that too, if only for the sake of curiosity, 'cause I must say I've never driven in 'comfort mode' and never will - in fact, it's slightly annoying that I have to put the car in 'sport mode' every time I start it. Doesn't make sense to me to have a 'comfort mode' in a performance car - there's never a time where I want the throttle response (or anything else along those lines) to be anything less than as fast as possible. I've never understood the point behind the idea of driving modes in general, but they're everywhere now.
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      01-03-2018, 08:47 PM   #28
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Quote:
Originally Posted by Nezil View Post
Please keep in mind that the OP (MerlinPurple) is based in the UK, and therefore his calculations are based on UK Gallons rather than US Gallons. He's also using V-Power Fuel, which has a RON rating of 99 if I remember correctly, with no added Ethanol, which would be somewhat equivalent to Ethanol free 94 AKI / (RON+MON)/2 US Fuel.

I find it funny that Brits often think that US drivers have it so good with cheap fuel, but the reality is that the cost is skewed because the gallon is smaller in the US, and the fuel is shit so the same cars are far less efficient. Yes, it is still cheaper to run a car in the US, but far less than it first appears.

For reference, a UK Gallon is 4.54 litres, and a US Gallon is 3.78. That's a difference of 20.1%.

MerlinPurple was getting 28.7 / 28.3 MPG in the UK, which given the calculation above, would be equal to 23.9 / 23.6 MPG in the US. That's still some pretty great numbers, and I'd have thought most of that would be down to the better fuel.

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Originally Posted by rich8566 View Post
Daily driving I get 24 MPH and on Long highway slogs I get 29 MPG.
Your 24 MPG figure ties in perfectly with what MerlinPurple found, but your 29 MPG is truly impressive!

I am lucky to get 19 MPG daily driving, and maybe 24 MPG on a long highway run. The only thing I can think of is this being the result of the crappy CA 10% Ethanol 91 AKI fuel that we have here!

I can get 100 AKI fuel about 45 minutes drive from here, but I'm not sure of the Ethanol content. My plan was to mix some 100 AKI with 91 AKI to get a 93 or 94 blend, but it's a lot of effort to fill up like that, and I'm not sure if I'd see any benefits in MPG.
In NY we get 94 octane fuel with 10% ethanol. My 29 MPG achievements come at the expense of no real heavy throttle except for once or twice over the course of a 250 mile highway run. Plus I cruise around 70-72 "real" MPH, but no more than about 74 MPH. You might say this doesn't sound like much fun, but this is usually connected to a couple of track days at Watkins Glen. On track, I get 6-7 MPG and I generally push as high as 145 MPH. After a couple of days on track I'm ready to kick back and cruise at a relatively slow pace.
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      01-03-2018, 10:20 PM   #29
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Quote:
Originally Posted by Nezil View Post
Please keep in mind that the OP (MerlinPurple) is based in the UK, and therefore his calculations are based on UK Gallons rather than US Gallons. He's also using V-Power Fuel, which has a RON rating of 99 if I remember correctly, with no added Ethanol, which would be somewhat equivalent to Ethanol free 94 AKI / (RON+MON)/2 US Fuel.

I find it funny that Brits often think that US drivers have it so good with cheap fuel, but the reality is that the cost is skewed because the gallon is smaller in the US, and the fuel is shit so the same cars are far less efficient. Yes, it is still cheaper to run a car in the US, but far less than it first appears.

For reference, a UK Gallon is 4.54 litres, and a US Gallon is 3.78. That's a difference of 20.1%.

MerlinPurple was getting 28.7 / 28.3 MPG in the UK, which given the calculation above, would be equal to 23.9 / 23.6 MPG in the US. That's still some pretty great numbers, and I'd have thought most of that would be down to the better fuel.



Your 24 MPG figure ties in perfectly with what MerlinPurple found, but your 29 MPG is truly impressive!

I am lucky to get 19 MPG daily driving, and maybe 24 MPG on a long highway run. The only thing I can think of is this being the result of the crappy CA 10% Ethanol 91 AKI fuel that we have here!

I can get 100 AKI fuel about 45 minutes drive from here, but I'm not sure of the Ethanol content. My plan was to mix some 100 AKI with 91 AKI to get a 93 or 94 blend, but it's a lot of effort to fill up like that, and I'm not sure if I'd see any benefits in MPG.

I have about 5 minutes of street driving and 25 of highway and I the best I can do is 25.5 MPG on that trip on CA gas, and that's if I am trying my hardest to get the most MPG I can. Normally I would average 19-20 the way I drive.

I wonder if there is something wrong with my engine...?
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      01-04-2018, 08:28 PM   #30
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Real quick side note, someone early mentioned they get 6-7 gallons on the track. I think the interior dash display only goes las low as 6.0 gallons mpg or what ever. But if you use the M Laptimer(IPhone only) you can actually get a reading with a lower gas mileage. You don’t need to use lap timer on just tracks by the way. Just turn it on and record your drive drive to wherever.
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      02-19-2020, 09:19 PM   #31
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Quote:
Originally Posted by MZWIE View Post
Why buy an M2 and worry about gas mileage. Totally inane.
Because some people have long commutes and still want an M2. It's not the cost of gas I am concerned with if that's your angle of argument, it's the number of stops to the gas station.

For those who have long highway commutes (30-50 mile), what do you average while being gentle on the throttle?
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      02-20-2020, 06:20 AM   #32
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Quote:
Originally Posted by MPR View Post
Because some people have long commutes and still want an M2. It's not the cost of gas I am concerned with if that's your angle of argument, it's the number of stops to the gas station.

For those who have long highway commutes (30-50 mile), what do you average while being gentle on the throttle?
My typical mixed is around 24mpg (US) but if I keep it steady and do go over 65 I can reach 30mpg.
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      02-22-2020, 06:41 PM   #33
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Finally saw an M2 in person at the dealership, they look wayy better in person than in pictures. Awesome seating position, I think I am sold on getting one.
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